172.56.28.0/23

AS21928 · T-Mobile USA, Inc.

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Summary

Country	United States
Domain	t-mobile.com
ASN	AS21928
Parent Range	172.32.0.0/11
Registry	ARIN
ID	TMO9

WHOIS Details

NetHandle:      NET-172-32-0-0-1
OrgID:          TMOBI
Parent:         NET-172-0-0-0-0
NetName:        TMO9
NetRange:       172.32.0.0 - 172.63.255.255
NetType:        allocation
Comment:        Geofeed https://raw.githubusercontent.com/tmobile/tmus-geofeed/main/tmus-geo-ip.txt
RegDate:        2012-09-18
Updated:        2020-11-18
Source:         ARIN


OrgID:          TMOBI
OrgName:        T-Mobile USA, Inc.
CanAllocate:    
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2003-01-02
Updated:        2017-01-28
OrgAdminHandle: DNSAD11-ARIN
OrgTechHandle:  DNSAD11-ARIN
OrgAbuseHandle: ABUSE4857-ARIN
Source:         ARIN


POCHandle:      DNSAD11-ARIN
IsRole:         Y
LastName:       DNS Administrators
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98027
RegDate:        2003-01-02
Updated:        2026-01-08
OfficePhone:    +1-888-662-4662
Mailbox:        ARINtechcontact@t-mobile.com
Source:         ARIN


POCHandle:      ABUSE4857-ARIN
IsRole:         Y
LastName:       abuse
FirstName:      
Street:         12920 SE 38th Street
City:           Bellevue
State/Prov:     WA
Country:        US
PostalCode:     98006
RegDate:        2014-09-23
Updated:        2025-05-27
OfficePhone:    +1-888-662-4662
Mailbox:        abuse@t-mobile.com
Source:         ARIN

Overlapping Ranges

BGP prefixes that contain 172.56.28.0/23

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

Nearby Ranges

BGP prefixes that overlap with 172.56.0.0/16

Range	ASN	Company	Num of IPs
172.32.0.0/11	AS21928	T-Mobile USA, Inc.	2,097,152

Hosted domains

There are 4 domain names hosted across 4 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
172.56.28.107	landlfamilytree.com	1
172.56.29.107	probatecoachtool.com	1
172.56.29.33	nexai.biz	1
172.56.28.228	kreenen.com	1

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
62.40.115.87	AS20965 GEANT Vereniging	`7.10ms` from Amsterdam, NL
147.243.48.71	AS8075 Microsoft Corporation	`0.32ms` from Amsterdam, NL
34.231.250.199	AS14618 Amazon.com, Inc.	`0.49ms` from Ashburn, US
162.192.25.55	AS7018 AT&T Enterprises, LLC	`11.76ms` from Atlanta, US
84.176.30.199	AS3320 Deutsche Telekom AG	`6.34ms` from Frankfurt am Main, DE
122.228.139.215	AS4134 CHINANET-BACKBONE	`10.17ms` from Hangzhou, CN
101.249.121.103	AS4134 CHINANET-BACKBONE	`12.10ms` from Lhasa, CN
89.214.44.167	AS42863 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`16.62ms` from Lisbon, PT
60.152.132.135	AS17676 SoftBank Corp.	`3.81ms` from Osaka, JP
52.79.100.183	AS16509 Amazon.com, Inc.	`0.15ms` from Seoul, KR
114.129.162.119	AS7477 SkyMesh Pty Ltd	`19.38ms` from Sydney, AU
24.143.130.247	AS40788 Start Communications	`16.31ms` from Toronto, CA
218.84.157.55	AS4134 CHINANET-BACKBONE	`8.99ms` from UEruemqi, CN
5.240.53.71	AS1257 Tele2 Sverige AB	`18.67ms` from Vilnius, LT
51.154.147.167	AS15796 Salt Mobile SA	`2.04ms` from Zuerich, CH
81.205.230.103	AS1136 KPN B.V.	`3.21ms` from Amsterdam, NL
142.109.1.7	AS53403 Mount Royal University	`1.34ms` from Calgary, CA
34.57.68.55	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
23.118.74.199	AS7018 AT&T Enterprises, LLC	`15.70ms` from Dallas, US
5.65.204.215	AS5607 Sky UK Limited	`5.85ms` from Erith, GB
103.136.8.167	AS138098 PT Nuon Digital Indonesia	`2.56ms` from Jakarta, ID
117.195.252.55	AS9829 National Internet Backbone	`6.41ms` from Kolkata, IN
216.17.60.231	AS10242 US Internet Corp	`0.35ms` from Minneapolis, US
144.24.103.23	AS31898 Oracle Corporation	`0.14ms` from Mumbai, IN
173.169.17.55	AS33363 Charter Communications, Inc	`9.19ms` from Orlando, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

traceroute -a -n -q1 -f4 -m7 172.56.28.48

traceroute to 172.56.28.48 (172.56.28.48): 7 hops max, 52 byte packets

4 [AS21928] 100.199.0.57 0.088 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Liuzhou, CN

On March 21st 2026

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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